Abstract: The present invention concerns a circuit arrangement for thermal protection of a power semiconductor, wherein there is provided a two-stage thermal protection in the control circuit and in the load circuit of the power semiconductor. A first stage (10) with temperature-dependent resistance device serves for reducing or switching off the control voltage of the power semiconductor (30) when a first threshold temperature is reached at the temperature-dependent resistance device. In addition, provided in the load circuit of the power semiconductor (30) is a second stage (20) with a cutout element thermally coupled to the power semiconductor (30) for interrupting a load current of the power semiconductor when a second threshold temperature is reached at the cutout element. In that case the first stage forms an active temperature protection for the power semiconductor (30) to avoid damage and the second stage forms a temperature protection in the case of a malfunction of the power semiconductor (30).

Abstract: The present invention concerns a control system for an electric motor, wherein an operating mode with predetermined value assignments is selected for a parameter set for controlling an electric motor and the pulse frequency of a control signal for the electric motor is set in accordance with the selected operating mode in order thereby to signal to the electric motor the selected value assignments for the parameter set.

Abstract: A contact device which is adapted to be mechanically mounted and electrically connected on a printed circuit board by a fastening portion and serves for receiving an external plug element. The contact device comprises a contact portion for inserting the external plug element for forming an electrical contact, an elastic support element for movably supporting the contact portion and for providing a possibility of movement in all spatial directions, wherein the support element includes a fastening part by which the contact device is fastened on the printed circuit board, a contact part for directly supporting the contact portion and a center part for connecting the fastening part and the contact part, the fastening part and the contact part bent relative to the center part, and of movement of the contact part and center part are limited by predetermined distances from adjacent external limiting means in the fastened state.

Abstract: The present invention concerns a method of and an apparatus for controlling a plurality of load elements in a motor vehicle, wherein corresponding load current pulses for the load elements are so produced that they overlap at least in the region of their rising and falling edges and wherein the configuration in respect of time of the load current pulses is controlled in such a way that a substantially constant overall current is also afforded from the total of the load current pulses of all load elements in the region of the rising and falling edges of the load current pulses.

Abstract: The invention relates to a cooling device for heat-emitting components, wherein at least one component is arranged on a printed circuit board and wherein the cooling device includes a first cooling member and a second cooling member. The two cooling members are arranged on the printed circuit board adjacent to and at a predetermined distance from the at least one component on opposite sides of the component. The invention further relates to a cooling arrangement for cooling at least one heat-emitting component arranged on a printed circuit board, wherein use is made of the cooling device.

Abstract: A lid element which can be connected to a further housing part for closing an opening in the housing part is formed in one piece as a molded part. The lid element includes a base plate on which several lugs are formed which extend from the base plate. The lugs are arranged on the base plate relative to the housing part in such a manner that the lugs, when the housing part and the lid element are put together, extend into indentations provided in the housing part after they have been plastically bent toward the housing part.

Abstract: A method of controlling a power feed to a load (L), wherein the load (L) can be connected to an apparatus (1) for the power feed and the power fed to the load (L) has clock-controlled signals. The method includes the steps of: detecting a temperature prevailing in the apparatus (1) by means of at least one temperature sensor (13, 14), providing a first safety function if the detected temperature is not greater than a predetermined first excessive temperature, providing a second safety function if the detected temperature is greater than the predetermined first excessive temperature, and again providing the first safety function if the detected temperature falls and reaches the first excessive temperature, wherein the first safety function includes constant cyclic clock control of the power fed to the load and the second safety function includes temporary cyclic clock control of the power fed to the load.

Abstract: The invention concerns a cover element (2) connectable to a housing lower portion (3) for covering same to form a housing device (1), wherein the cover element is formed in one piece as a shaped portion, the lower surface (16) of the cover element, that faces in the direction of the lower portion, is so designed that it follows the contour of the inside surface of the lower portion, and projections and recesses in the lower surface of the cover element are of such a configuration that recesses in the inside surface of the lower portion are at least partially filled and projections on the inside surface of the lower portion are at least partially surrounded in positively locking relationship.

Abstract: The present invention concerns a method of and an apparatus for controlling a plurality of load elements in a motor vehicle, wherein corresponding load current pulses for the load elements are so produced that they overlap at least in the region of their rising and falling edges and wherein the configuration in respect of time of the load current pulses is controlled in such a way that a substantially constant overall current is also afforded from the total of the load current pulses of all load elements in the region of the rising and falling edges of the load current pulses.

Abstract: A method of controlling a power feed to a load (L), wherein the load (L) can be connected to an apparatus (1) for the power feed and the power fed to the load (L) has clock-controlled signals. The method includes the steps of: detecting a temperature prevailing in the apparatus (1) by means of at least one temperature sensor (13, 14), providing a first safety function if the detected temperature is not greater than a predetermined first excessive temperature, providing a second safety function if the detected temperature is greater than the predetermined first excessive temperature, and again providing the first safety function if the detected temperature falls and reaches the first excessive temperature, wherein the first safety function includes constant cyclic clock control of the power fed to the load and the second safety function includes temporary cyclic clock control of the power fed to the load.